CN108415375B - Electronic cam control method for multi-spindle machining - Google Patents

Abstract

The invention belongs to the technical field of mechatronics, and provides an electronic cam control method for multi-spindle machining. By using different electronic cam tables, the driven shaft is controlled to follow the movement of the driving shaft with different electronic cam curves. In this method, the CAD model of the part is partitioned to generate an electronic cam table through the data processing module, and the electronic cam curve is generated through the electronic cam table, and the motion control command is sent according to the real-time position information of the driving shaft and the driven shaft; the motion control command is received through the servo drive module. command, and drive the movement of the master shaft and the slave shaft; the real-time position information of the master shaft and the slave shaft is detected through the position feedback mode, and the closed-loop control is realized. The invention can realize multi-spindle simultaneous processing, and solve the problems of low processing efficiency, single mode and difficult motion control of multi-spindle processing in the prior art.

Description

An electronic cam control method for multi-spindle machining

technical field

The invention belongs to the technical field of mechatronics, and relates to an electronic cam control method for multi-spindle machining.

Background technique

The electronic cam is an intelligent controller that simulates a mechanical cam. It uses the position sensor to feed back the position information to the processing unit. Level signal is set and output. Electronic cams can be used in various fields such as automobile manufacturing, metallurgy, machining, textiles, printing, food packaging, water conservancy and hydropower.

Traditional CNC machining has only one spindle, the machining mode is single and the machining efficiency is low. Today's CNC machining has developed towards high speed and high precision. In order to process different contours of parts at the same time or batch process the same parts, multi-spindle CNC machine tools have been derived. For the processing of complex or a large number of parts, it has high work efficiency that saves time and effort.

Contents of the invention

Aiming at the problems of low single-spindle machining efficiency, single mode, and difficult motion control of multi-spindle machining in the prior art, the present invention provides a motion control method for multi-spindle machining. Through the use of different electronic cam tables, the driven shaft is controlled to follow the movement of the active shaft with different electronic cam curves to realize multi-spindle simultaneous processing.

In order to achieve the above object, technical scheme of the present invention is:

An electronic cam control method for multi-spindle machining. The electronic cam control method is realized based on an electronic cam control system. The electronic cam control system includes a data processing module, an electronic cam control module, a position feedback module and a servo drive module.

The data processing module generates electronic cam tables of different processing areas according to the imported part CAD model. The electronic cam control module is connected with the data processing module, generates an electronic cam curve according to the electronic cam table, and sends a motion control command. The servo drive module is connected with the electronic cam control module for receiving motion control instructions and driving the driving shaft and the driven shaft to move. The position feedback module is connected with the servo drive module for detecting the real-time position information of the driving shaft and the driven shaft, and is connected with the electronic cam control module to transmit the real-time position information of the driving shaft and the driven shaft to the electronic cam control module, Realize closed-loop control. The electronic cam control system further includes a storage module, which is used to store the electronic cam curves according to the processing cycle.

The electronic cam control module includes a motion controller, and the motion controller sends motion control instructions according to the electronic cam curve and the real-time position information of the driving shaft and the driven shaft. The motion controller includes a motion control card, a programmable logic controller, etc.; the type of motion control instruction includes pulse.

The servo drive module includes a servo driver, a servo motor, a driving shaft, N driven shafts, a main shaft and a main shaft tool, wherein the main shaft is installed on the driven shaft, the main shaft tool is installed on the main shaft, the driving shaft and the driven shaft The position relationship of the shaft is determined according to the electronic cam curve. The servo driver is used to receive motion control instructions and drive the servo motor to move; the servo driver includes a driving shaft servo driver and a driven shaft servo driver; the servo motor includes a driving shaft servo motor and a driven shaft servo motor; The mechanical transmission structure of the driving shaft and the driven shaft includes a ball screw, a rack and pinion, and the like.

The position feedback module includes a driving shaft position sensor and a driven shaft position sensor for collecting the position information of the driving shaft and the driven shaft; the driving shaft position sensor and the driven shaft position sensor include a grating ruler and an encoder, etc. .

An electronic cam control method for multi-spindle machining, realized based on a multi-spindle processing device, the multi-spindle processing device includes a motion controller, a driving shaft, a driven shaft, a main shaft, a main shaft tool, a servo driver, a servo motor and a position sensor, Include the following steps:

Step (a): Obtain the CAD model of the part.

Step (b): Import the CAD model of the part into the data processing module, and partition the CAD model of the part according to the number of spindle tools N (N is not less than 2) and the distance between the spindles in the multi-spindle processing device; according to the diameter of the spindle tool and the tool feed The specific number of processing cycles can be obtained by measuring; the electronic cam table is generated according to the processing cycle and the CAD model of the partitioned part.

Step (c): Import the electronic cam table into the electronic cam control module, and the electronic cam curve is generated by the motion controller of the electronic cam control module, and each processing cycle corresponds to N electronic cam tables and electronic cam curves; the storage module is used Electronic cam curves are stored for each machining cycle.

Step (d): The driving shaft position sensor detects the position information of the driving shaft, and the driven shaft position sensor detects the position information of the driven shaft; the position information is fed back to the motion controller in the electronic cam control module through the position feedback module, and through the motion control The controller sets the speed of the master axis.

Step (e): The motion controller sends a motion control instruction to the active shaft servo driver in the servo drive module according to the speed and position information of the active shaft in the processing cycle, and the active shaft servo driver drives the active shaft servo motor and drives the active shaft to move; The motion controller sends motion control commands to the driven shaft servo driver in the servo drive module according to the electronic cam curve and position information in the processing cycle, and the driven shaft servo driver drives the driven shaft servo motor and drives the driven shaft to move.

Step (g): repeating steps (d) to (e), until the processing cycle ends.

Step (h): Adjust the processing position of the driven shaft, enter the next processing cycle, repeat steps (d) to (g), until the end of all processing cycles, that is, the end of the processing of the entire part.

An electronic cam control method for multi-spindle machining of the present invention uses the characteristics of the electronic cam to control multi-spindle simultaneous machining, which not only greatly improves the machining efficiency, but also solves the problems of complex structure and difficult motion control of the multi-spindle machining method .

Description of drawings

Fig. 1 is a schematic diagram of the working principle of the present invention.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention.

Fig. 3 is a schematic flow chart of an embodiment of the present invention.

Fig. 4 is a schematic diagram of an electronic cam curve according to an embodiment of the present invention.

In the figure: 1 part CAD model; 2 data processing module; 3 electronic cam control module; 4 position feedback module; 5 servo drive module; 6 driving shaft; 7 horizontal axis; 8 first driven shaft; 9 second driven shaft ; 10 paint samples; 11 spindle tool; 12 electronic cam curve; 13 electronic cam curve.

Detailed ways

In order to make the purpose, technical scheme and effect of the present invention clearer and more definite, the present invention will be further described in detail by taking the processing of "paint sample block" as an example below. It should be understood that the specific embodiments described here are used to explain the present invention, not to limit the present invention.

The present invention provides an electronic cam control method for multi-spindle machining, and FIG. 1 is a schematic diagram of the working principle of the present invention. The method includes a part CAD model 1 , a data processing module 2 , an electronic cam control module 3 , a position feedback module 4 and a servo drive module 5 , and also includes a storage module 6 .

As shown in FIG. 2 , it is a schematic structural diagram of an embodiment of the present invention. The structure includes a driving shaft 6 , a transverse shaft 7 , a first driven shaft 8 , a second driven shaft 9 , a “paint sample block” 10 , and a spindle tool 11 .

In this embodiment, the part CAD model 1 is a "paint sample block" CAD model, and the data format is IGS; the length of the "paint sample block" 10 is 600 mm, the width is 600 mm, and the height is 300 mm; the spindle tool 11 is a flat milling cutter , the tool spacing is 300mm, the tool diameter is 3mm, and the tool feed rate is 3mm; the data processing module 2 generates the electronic cam table of the first driven shaft 8 and the electronic cam table of the second driven shaft 9; the electronic cam control module 3 The electronic cam curve 12 of the first driven shaft 8 and the electronic cam curve 13 of the second driven shaft 9 are generated; the electronic cam control module 3 includes a programmable controller.

In this embodiment, the active shaft 6, the first driven shaft 8, and the second driven shaft 9 all have built-in grating scales; the servo drive module 5 includes the servo drive of the active shaft 6, the servo driver, the servo driver of the second driven shaft 9 , the servo motor of the driving shaft 6 , the servo motor of the first driven shaft 8 and the servo motor of the second driven shaft 9 .

As shown in Figure 3, the following steps are included in this embodiment:

Step S31: Obtain the CAD model of the "paint sample block".

Step S32: Import the "paint sample block" CAD model into the data processing module 2, and divide it into two processing areas with a width of 300 mm, and obtain a processing cycle of 100 times; each processing cycle is divided into two processing areas The electronic cam table of the first driven shaft 8 and the electronic cam table of the second driven shaft 9 are obtained through processing.

Step S33: Import the above-mentioned electronic cam table into the electronic cam control module 3 to generate the electronic cam curve 12 and the electronic cam curve 13 of each processing cycle; the above-mentioned storage module 6 stores the electronic cam curve 12 and the electronic cam curve 13 according to the processing cycle .

Step S34: The grating ruler detects the position information of the driving shaft 6, the first driven shaft 8, and the second driven shaft 9; the position information is fed back to the programmable controller in the electronic cam control module 3 through the position feedback module 4, and The speed of the driving shaft is set to 50mm/s by the programmable controller.

Step S35: The programmable controller sends pulses to the servo drive of the drive shaft 6 in the servo drive module 5 according to the speed and position information of the drive shaft 6 in the processing cycle, and the servo drive of the drive shaft 6 drives the servo motor of the drive shaft 6 and Drive the driving shaft 6 to move; the programmable controller sends pulses to the first driven shaft 8 and the second driven shaft 9 in the servo drive module 5 according to the electronic cam curve 12, electronic cam curve 13 and position information in the processing cycle The servo driver of the first driven shaft 8 drives the servo motor of the first driven shaft 8 and drives the first driven shaft 8 to move, and the servo driver of the second driven shaft 9 drives the second driven shaft 9 The servo motor drives the second driven shaft 9 to move.

Step S36: Repeat the above steps S34-S35 until the processing cycle ends.

Step S37: The first driven shaft 8 and the second driven shaft 9 step 3mm along the horizontal axis 7, enter the next processing cycle, repeat the above steps S34-S36, until the end of all processing cycles, that is, the entire "paint sample block" "10 processing is over.

As shown in FIG. 4 , it is a schematic diagram of the electronic cam curve 12 and the electronic cam curve 13 of the 50th machining cycle of this embodiment. It can be seen from the figure that according to the method of the present invention, the characteristics of the electronic cam are used to control two spindles to process simultaneously, which not only greatly improves the machining efficiency, but also solves the problems of complex structure and difficult motion control of the multi-spindle machining method.

The above disclosures are only preferred embodiments provided by the present invention, and are not intended to limit the scope of the embodiments of the present invention. All equivalent changes made by those skilled in the art according to the present invention shall belong to the present invention the scope covered.

Claims (1)

1. An electronic cam control method for multi-spindle machining, characterized in that, the electronic cam control method is realized based on a multi-spindle machining device, comprising the following steps: Step (a): obtaining the part CAD model; Step (b): Import the CAD model of the part into the data processing module, and partition the CAD model of the part according to the number of spindle tools N and the distance between the spindles in the multi-spindle processing device, where N is not less than 2; The feed rate obtains the specific number of processing cycles; the electronic cam table is generated according to the processing cycle and the part CAD model after the partition; the data processing module generates the electronic cam table of different processing areas according to the imported part CAD model; Step (c): Import the electronic cam table into the electronic cam control module, and the electronic cam curve is generated by the motion controller of the electronic cam control module, and each processing cycle corresponds to N electronic cam tables and electronic cam curves; the storage module is used Store the electronic cam curve according to each processing cycle; the electronic cam control module is connected with the data processing module, generates the electronic cam curve according to the electronic cam table, and sends a motion control command; Step (d): The position sensor of the driving shaft and the position sensor of the driven shaft respectively detect the position information of the driving shaft and the driven shaft, and feed back the position information to the motion controller in the electronic cam control module through the position feedback module, and through the motion control The speed of the driving shaft is set by the device; the position feedback module is connected with the servo drive module, and connected with the electronic cam control module, and transmits the real-time position information of the driving shaft and the driven shaft to the electronic cam control module to realize closed-loop control; The servo drive module includes a servo driver, a servo motor, a driving shaft, N driven shafts, a main shaft, and a main shaft tool, wherein the main shaft is installed on the driven shaft, the main shaft tool is installed on the main shaft, and the The position relationship is determined according to the electronic cam curve; Step (e): The motion controller sends a motion control instruction to the active shaft servo driver in the servo drive module according to the speed and position information of the active shaft in the processing cycle, and the active shaft servo driver drives the active shaft servo motor and drives the active shaft to move; The motion controller sends motion control commands to the driven shaft servo driver in the servo drive module according to the electronic cam curve and position information in the processing cycle, and the driven shaft servo driver drives the driven shaft servo motor and drives the driven shaft to move; Step (g): Repeat steps (d) to (e), and the processing cycle ends so far; Step (h): Adjust the processing position of the driven shaft, enter the next processing cycle, repeat steps (d) to (g), until the end of all processing cycles, that is, the end of the processing of the entire part.